Blade for agricultural implements.



No. 788,296. PATENTED FEB. 21, 1905. W. J. MILES, JR. BLADE FORAGRICULTURAL IMPLEMENTS.

APPLICATION FILED SEPT. 27, 1902.

Witnesses:

I I Attornegs.

Edi/25w.

UNTTED STATES Patented I e oruary, 21, 1 905,

PATENT EETcE.

BLADE FOR AGRICULTURAL IMPLEMENTS.

SPECIFICATION forming part of Letters Patent No. 783,296, dated February21, 1905.

Application filed September 2'7, 1902. Serial No. 125,116.

To all whom it may concern:

Be it known that 1, WILLIAM J. MILES, J r., a citizen of the UnitedStates, residing at Middletown, in the county of Butler and State ofOhio, have invented a new and useful Blade for Agricultural Implements,of which the following is a specification.

This invention relates to the manufacture of blades for agriculturalimplements, under which generic term may be included cultivator-shovels,plowshares, moldboards,and other parts of agricultural implementspresenting a cutting edge to the earth.

The object of the invention is without materially adding to the cost ofproduction of such structures to increase to a great extent theirwearing qualities, to reduce danger of springing or buckling when beingtempered to a minimum, and practically to obviate breakage in use.

The present invention consists in the manufacture of blades foragricultural implements in which the face and edges and a small portionof the back are formed of hardened steel which is integral with a coreof untempered metal, such as wrought-iron, whereby the edges of theblade will be given the same wear-resisting qualities as the face andblades will be produced in which the edge retains its sharpness evenafter a considerable amount of wear has taken place.

The construction of cultivator shovels, plowshares, and the like ofseveral laminae of different degrees of hardness is, broadly considered,old, and it is also old to manufacture blades for agriculturalimplements with hardened faces and soft backs, formed integral bychilling the face of the blade and then annealing it without softeningthe chilled face. Both of these types of blades are useful in reducingthe liability of breakage; but neither is effective in diminishing thewear at the edge of the blade, which is the principal object of thepresent invention.

In the accompanying drawings, forming part of this specification, inwhich like characters of reference indicate corresponding parts, thereis illustrated aform of blank for the construction of blades of thecharacter contemplated in this invention, and there is also shown acultivator-shovel constructed from a blank of one of the formsillustrated.

In the drawings, Figure l is a view in perspective, partly in section,of a blade for agricultural implements constructed in accordance withthe present invention, the view being taken from the front. Fig. 2 is aview of an elevation, taken from the rear of the blade. Fig.3 is aperspective detail view of the blank or ingot from which the blade isformed.

Referring to the drawings, 1 designates the core, which is relativelybroad and may be madeof wrought-iron or soft untempered steel. On theoutside of the core 1 and fixed thereon or suitably attached thereto byWelding or otherwise is a sheath or envelop 2 of a highgradecarbon-steel. As shown in Figs. 1 and 2, the face 3 and sides or edges4, the lower end or point 5, and a portion of\ the rear of the corecontiguous to its edges are covered by the envelop, the upper end of thecore being exposed and the back practically so. As shown on Figs. 1 and3, the corners of the rear side of the core are beveled, as at 6, andthe sheath is extended over these beveled portions to form a more secureunion between the envelop and the core and also to prevent wear of itscorners at the back. In Fig. 3 there is shown a blank or ingot fromwhich the blade or other part of an agricultural implement may be made,this being effected by rolling, stamping, forging, or otherwise to bringit to the desired shape.

l/Vhen a cultivator-shovel or other blade for agricultural implements isconstructed from a blank, as shown, the face, edges, point, and aportion of the back of the core will be fully protected by thehard-steel shield and the core will give sufiicient toughness to theblade to prevent breakage when brought into forcible contact with a rootor heavy stone. Furthermore, the core will positively prevent bucklingor springing of the blade when being tempered.

The particular feature of advantage which is possessed by a blade suchas shown and described over other blades consisting in part of hardtempered steel and in part of soft untempered metal lies in theextension of the hard envelop over the edges, point, and a portion ofthe back of the core. By thus protecting the core uniformity of Wear ofthe front, edges, and point of the blade is secured, and grooving of theedges, Which is a common defect in blades made up of laminae difieringin hardness, is completely obviated.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is-

l. A blade for agricultural implements,com prising a relatively softcore and an envelop or sheath of hardened metal entirely covering thefront and sides but only a portion of the back of the core.

2. A blade for agricultural implements,comprising a relatively soft coreand an envelop or sheath of hardened metal entirely covering the front,sides, and one end of the core but only a portion of its back.

3. A blade for agriculturalimplements,comprising a relatively broad andthin core of soft metal having a tapered point and the cor ners of itsrear side beveled, and a protective envelop or sheath of hard metalextending over the face, edges, beveled corners and point of the core,and lying flush With the rear side thereof.

In testimony that I claim the foregoing as my ownI have hereto afiixedmy signature in the presence of two Witnesses.

WILLIAM J. MILES, JR

Witnesses:

F. WV. FRARY, WM. E. COLLINS.

